In this paper we present the preliminary results of simulation-based experiments of an integrated scheme that has been proposed to control taxi supplydemand imbalance in the context of a smart city with multiple taxi operators and using Connected Mobility. We particularly explore the difference between centralized and decentralized implementations of the scheme as well as between collabora-A Connected Mobility Scheme for Taxi Supply-Demand Balancing 551 tive and competitive attitudes of connected taxis. Our results show that by sharing knowledge about supply-demand imbalance and adopting a collaborative attitude, connected taxi systems can improve the performance of the service across a city by achieving a better supply-demand service balancing while improving their profits.